Historical mystery, british family hires investigator to search for missing girl

[J]

Possibly set around World War I. Search takes investigator to Greece and plot twist is to cover up a gay relationship.

[Lobstergirl, au gratin]

When did you read it? What plot twist was covering up the gay relationship, who was in the gay relationship? How old is the missing girl?

[J]

Read in 2007 but the book wasn't new at that time. Girl was teenage or older. Relationship involved a politician.

[Lobstergirl, au gratin]

J, are you still looking for this book?

[J]

I forgot about this post since it had no activity for so long. I'm still curious, but it isn't a big deal. And honestly, I remember even less about the book than I knew to begin with!

[Tab]

Was this part of a series?
Anything about the cover?
Was the missing girl the family's daughter, cousin, friend?

[Lobstergirl, au gratin]

J, are you still looking for this or did you find it?

[Lobstergirl, au gratin]

No response. Moving to Abandoned.